docs: def as_coeff_unit(self):
          """Factor the coefficient multiplying a unit
  
          For units that are multiplied by a constant dimensionless
          coefficient, returns a tuple containing the coefficient and
          a new unit object for the unmultiplied unit.
  
          Example
          -------
  
          >>> import unyt as u
          >>> unit = (u.m**2/u.cm).simplify()
          >>> unit
          100*m
          >>> unit.as_coeff_unit()
          (100.0, m)
          """
          coeff, mul = self.expr.as_coeff_Mul()
          coeff = float(coeff)
          ret = Unit(
              mul,
              self.base_value / coeff,
              self.base_offset,
              self.dimensions,
              self.registry,
          )
          return coeff, ret